Astudent observes this cell under the microscope. he is discussing the structure indicated by the arrow with his lab partner. what would be the most likely classification of the cell pictured based on the structure they are observing?

This cell is eukaryotic because it contains membrane-bound organelles such as lysosomes and vacuoles.

Eukaryotic cell.  

Explanation:

The eukaryotic cells are those cells, in which true nucleus is present along with other membrane-bound organelles, such as lysosomes, endoplasmic reticulum, mitochondria, and chloroplast (in case of plant cells).

As in given diagram, the arrows represents membrane-bound organelle, lysosome, this picture can be classified as an eukaryotic cell.

the answer is b.) hydrogen bonds between bases.

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.